678841443636 has 12 divisors (see below), whose sum is σ = 1583963368512. Its totient is φ = 226280481208.

The previous prime is 678841443619. The next prime is 678841443653. The reversal of 678841443636 is 636344148876.

It is an interprime number because it is at equal distance from previous prime (678841443619) and next prime (678841443653).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 678841443636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28285060140 + ... + 28285060163.

It is an arithmetic number, because the mean of its divisors is an integer number (131996947376).

Almost surely, 2^678841443636 is an apocalyptic number.

It is an amenable number.

678841443636 is an abundant number, since it is smaller than the sum of its proper divisors (905121924876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678841443636 is a wasteful number, since it uses less digits than its factorization.

678841443636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56570120310 (or 56570120308 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 60.

The spelling of 678841443636 in words is "six hundred seventy-eight billion, eight hundred forty-one million, four hundred forty-three thousand, six hundred thirty-six".